Finding the Fourth Proportional to 91.98, 137.94 and 53.46

Step by Step Solution

1. Step 1: Write the proportion equation
   91.98 : 137.94 = 53.46 : x
2. Step 2: Convert to fraction form
   91.98/137.94 = 53.46/x
3. Step 3: Cross multiply
   91.98x = 137.94 × 53.46
4. Step 4: Simplify right side
   91.98x = 7,374.27
5. Step 5: Solve for x
   x = 7,374.27/91.98
6. Step 6: Final answer
   x = 80.17